A construction process for a long-span steel structure ring bridge and its auxiliary welding equipment

Abstract

This invention discloses a construction process for a large-span steel structure ring bridge and its auxiliary welding equipment. The construction process specifically includes the following steps: Step S001, segmental beam fabrication in the factory; pier pouring and temporary support erection; wherein the temporary support includes a reinforced concrete foundation at the bottom and steel pipe lattice columns at the top. Step S002, segmental beam transportation; crane positioning; Step S003, segmental beam hoisting: hoisting the segmental beams onto the piers and temporary supports using a crane; Step S004, full-bridge welding of the steel bridge: welding the gaps between adjacent segmental beams; Step S005, painting; Step S006, temporary support removal; Step S007, terrain creation to conceal the piers; auxiliary welding equipment is used to assist welders in completing the gaps between adjacent segmental beams on the bridge deck. This application enables the construction of a large steel structure ring bridge to meet the requirements of the park site; it effectively conceals the piers after the bridge is completed, improving the aesthetics of the bridge and enhancing the overall viewing experience of the park; in summary, it meets the requirements of the park project construction.

Description

Technical Field

[0001] This invention relates to the field of steel structure bridges, and in particular to a construction process for a long-span steel structure ring bridge and its auxiliary welding equipment. Background Technology

[0002] Steel box girders, also known as steel plate box girders, are frequently used in bridges with large spans (in bridges, a single span of 40 to 150 meters is considered a large span). Steel box girders are the most common and stable structure in large steel structure bridges. To ensure operational safety, these large steel structure bridges require the erection of a high density of temporary supports during construction.

[0003] Due to site constraints, the large-scale erection work could not be carried out in accordance with the municipal "full site" construction mode during the construction of the park project. This restricted the construction of large steel structure bridges. At the same time, the park has high aesthetic requirements, and the high density of temporary supports affected its aesthetics. Summary of the Invention

[0004] To address the technical limitations of using large steel structure bridges in park construction projects, this invention provides a construction process for a large-span steel structure ring bridge and its auxiliary welding equipment.

[0005] The present invention provides a construction process for a long-span steel structure ring bridge and its auxiliary welding equipment, which adopts the following technical solution:

[0006] A construction process for a long-span steel structure ring bridge includes the following steps:

[0007] Step S001: Segment beam fabrication in the factory; pier pouring and temporary support erection; wherein the temporary support includes the bottom reinforced concrete foundation and the upper steel pipe lattice column;

[0008] Step S002: Segment beam transportation; crane in place;

[0009] Step S003, Segment beam hoisting: The segment beams are hoisted onto the piers and temporary supports using a crane;

[0010] Step S004, Welding of the entire steel bridge: Welding the gaps between adjacent segment beams;

[0011] Step S005, painting;

[0012] Step S006: Remove temporary supports;

[0013] Step S007: Create terrain to hide bridge piers.

[0014] By adopting the above-mentioned technical solutions, and fabricating segmented beams in the factory before transporting them to the site for installation, there is no need to set up a welding area for the segmented beams on site, which is suitable for the limited space of the park project. At the same time, the temporary support, including the reinforced concrete foundation at the bottom and the steel pipe lattice columns at the top, greatly increases the strength of the temporary support, thereby appropriately reducing the number of temporary supports and meeting the limited space of the park project. In addition, after the bridge is completed, the piers are hidden by creating terrain, which meets the park's requirement for good aesthetics and improves the overall viewing experience. In summary, the above construction technology enables the large steel structure bridge to meet the construction requirements of the park project.

[0015] A welding auxiliary device for a long-span steel structure ring bridge includes a support guide rail and a moving plate device. The support guide rail includes a pair of parallel rectangular sliding guide rails. The sliding guide rails are detachably fixed to the bridge deck, and the pair of sliding guide rails are located on both sides of the welding gap. The moving plate device includes a moving plate that moves horizontally along the length direction of the pair of sliding guide rails and a translation drive mechanism for driving the moving plate. A rectangular welding port with openings at the top and bottom is provided in the middle of the moving plate. The welding port is located directly above the welding gap. The distance between the pair of sliding guide rails is adjustable. The width of the welding port perpendicular to the moving direction of the moving plate is adjustable.

[0016] By adopting the above technical solution, during operation, the welder squats on the moving plate, and then the translation drive mechanism drives the moving plate to move horizontally along the length of a pair of sliding guide rails. During this process, the welder welds the weld seam through the welding port. In this way, the welder does not need to pay attention to the steel columns on the upper surface of the steel box girder during the welding process, which improves the welding focus and thus improves the efficiency of manual welding. By adjusting the distance between the pair of sliding guide rails and the width of the welding port perpendicular to the moving direction of the moving plate, the welding auxiliary equipment can adapt to the arc-shaped weld seam, thereby adapting to the arc-shaped bridge deck and improving the overall welding efficiency.

[0017] Optionally, the movable plate includes a pair of longitudinal support plates and a pair of transverse support plates; the longitudinal support plates correspond one-to-one with the sliding guide rails and are parallel to the length direction of the sliding guide rails; the pair of transverse support plates are perpendicular to the length direction of the sliding guide rails; the welding port is the gap between the pair of longitudinal support plates and the pair of transverse support plates; the pair of transverse support plates are slidably disposed on the lower end surfaces of the pair of longitudinal support plates and the sliding direction is perpendicular to the length direction of the sliding guide rails; a transverse adjustment component is provided on the longitudinal support plate; the transverse adjustment component is used to adjust the position between the longitudinal support plate on the corresponding side and the pair of transverse support plates.

[0018] By adopting the above technical solution, the position between the longitudinal support plate and the pair of transverse support plates on the corresponding side is adjusted by the transverse adjustment component on the corresponding side, so that the width of the welding port perpendicular to the moving direction of the moving plate is adjusted.

[0019] Optionally, the length of the sliding guide rail can be adjusted.

[0020] By adopting the above technical solution, the length of the sliding guide rail can be adapted to welding gaps of different lengths, making it highly adaptable.

[0021] Optionally, the sliding guide rail includes several sliding guide rail segments distributed along its length; a limiting component is provided at the bottom of the sliding guide rail segment; the limiting component is used to connect to the bridge deck.

[0022] By adopting the above technical solution, multiple sliding guide rail segments are combined to form a sliding guide rail, which can be combined to form sliding guide rails of different lengths. At the same time, since the length of the sliding guide rail segments can be set, it is beneficial for subsequent transportation and storage.

[0023] Optionally, the support guide rail further includes a pair of longitudinal baffles; the pair of longitudinal baffles are respectively disposed at both ends of the pair of sliding guide rails and respectively block the openings at both ends of the gap between the pair of sliding guide rails; the upper end surface of the longitudinal baffle is flush with the upper end surface of the sliding guide rail; the longitudinal baffle has various length specifications.

[0024] By adopting the above technical solution, the welding position is located between a pair of longitudinal baffles and a pair of sliding guide rails, which effectively blocks the wind, thereby improving the welding environment and helping to improve the welding quality; and the longitudinal baffles have various length specifications, which allows the longitudinal baffles to adapt to the changes in the spacing between the pair of sliding guide rails.

[0025] Optionally, the movable plate is provided with windproof devices on both sides in its translational direction; the windproof device includes a connecting frame detachably fixed to the movable plate and a windproof cloth detachably installed on the connecting frame; the lower end face of the windproof cloth is flush with the upper end face of the longitudinal baffle, and the upper end face is higher than the upper end face of the movable plate; the distance between the middle part of the end of the windproof cloth away from the movable plate and the movable plate is greater than the distance between the two ends of the windproof cloth and the movable plate.

[0026] By adopting the above technical solution, the windproof cloth is used to block the wind. At the same time, the distance between the middle of the end of the windproof cloth away from the moving plate and the moving plate is greater than the distance between the two ends of the windproof cloth and the moving plate, thereby effectively reducing wind resistance and ensuring that the moving plate moves forward smoothly.

[0027] Optionally, the connecting frame includes a pair of side connecting frames and a middle connecting frame; the middle connecting frame is located between the pair of side connecting frames; the spacing between the pair of side connecting frames is adjustable; the side connecting frame includes an inverted L-shaped side connecting main frame detachably fixed to the movable plate and a cylindrical side connecting rod fixed to the lower end face of the horizontal part of the side connecting main frame; the middle connecting frame includes an inverted L-shaped middle connecting main frame detachably fixed to the movable plate and a cylindrical middle connecting rod fixed to the lower end face of the horizontal part of the middle connecting main frame; the windproof cloth is connected end to end and sleeved on the pair of side connecting rods and the middle connecting rod from bottom to top.

[0028] By adopting the above technical solution, the windbreak cloth can be installed by direct sleeve, which is convenient for the windbreak cloth to be installed and removed; at the same time, the spacing between a pair of intermediate connecting frames is adjustable, so that the windbreak cloth can still be installed and used after the spacing between a pair of sliding guide rails is changed.

[0029] Optionally, a processing device is also included; a pair of lower support plates are provided on the bottom surface of the moving plate; the pair of lower support plates are distributed along the length direction of the sliding guide rail and located on both sides of the welding port; the processing device includes a pair of vertical adjustment plates, a cleaning mechanism, and a coating mechanism; the vertical adjustment plates correspond one-to-one with the lower support plates; the pair of lower support plates are located between the pair of vertical adjustment plates; the vertical adjustment plates are vertically slidably disposed on the corresponding side of the lower support plates and the vertical position of the vertical adjustment plates is adjustable; the cleaning mechanism is detachably connected to the bottom of the vertical adjustment plate located at the front end of the moving direction of the moving plate; the cleaning mechanism has various length specifications; the coating mechanism is detachably connected to the bottom of the vertical adjustment plate located at the rear end of the moving direction of the moving plate.

[0030] By adopting the above technical solution, when welding, the coating mechanism is higher than the bridge deck, and the cleaning mechanism set at the front end of the moving plate in the direction of movement is used to clean the weld seam, which is conducive to improving the subsequent welding quality; when coating, the cleaning mechanism set at the front end of the moving plate in the direction of movement first cleans, and then the coating mechanism set at the rear end of the moving plate in the direction of movement coats the weld seam, which is conducive to improving coating efficiency.

[0031] Optionally, the bottom of the movable plate is provided with two sets of auxiliary support components; the two sets of auxiliary support components are located on both sides of the welding port; each auxiliary support component includes a pair of auxiliary support members; the pair of auxiliary support members are distributed along the moving direction of the movable plate; each auxiliary support member includes an auxiliary support base and a caster wheel mounted on the lower end surface of the auxiliary support base; the position of the auxiliary support base in the moving direction perpendicular to the movable plate is adjustable.

[0032] By adopting the above technical solution, the four auxiliary support seats and four casters play an auxiliary support role. At the same time, since the position of the auxiliary support seats in the direction of movement perpendicular to the moving plate is adjustable, the steel columns on the upper surface of the segmented beam can be avoided.

[0033] In summary, the beneficial effects of the present invention are as follows:

[0034] 1. To ensure that large steel structure bridges meet the construction requirements of the park project.

[0035] 2. Welders do not need to pay attention to the steel columns on the upper surface of the steel box girder during the welding process, which improves their focus and thus increases the efficiency of manual welding.

[0036] 3. It effectively blocks wind, thereby improving the welding environment and contributing to higher welding quality. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the construction process of the present invention.

[0038] Figure 2 This is a top view of the steel structure ring bridge of the present invention.

[0039] Figure 3 This is a top view of the steel structure ring bridge of the present invention.

[0040] Figure 4 This is a cross-sectional structural schematic diagram of the present invention.

[0041] Figure 5 This is the invention Figure 4 A magnified structural diagram of part A in the diagram.

[0042] Figure 6 This is a top view of the supporting guide rail 60 of the present invention.

[0043] Figure 7 This is a top view of the movable plate of the present invention.

[0044] Figure 8 This is a top view of the movable plate in a partial cross-section of the present invention.

[0045] Figure 9 This is a schematic diagram of the side connecting frame 82 of the present invention.

[0046] Figure 10 This is a schematic diagram of the structure of the intermediate connecting frame 83 of the present invention.

[0047] Figure 11 This is a front view structural schematic diagram of the horizontal support plate 73, the vertical adjustment plate 91, and the cleaning mechanism 93 of the present invention.

[0048] Figure 12 This is the invention Figure 11 A schematic diagram of the cross-section of BB.

[0049] Figure 13 This is a front view structural schematic diagram of the horizontal support plate 73, the vertical adjustment plate 91, and the coating mechanism 94 of the present invention.

[0050] Figure 14 This is a schematic diagram of the vertical adjustment plate 91 and the coating mechanism 94 of the present invention.

[0051] Explanation of reference numerals in the attached figures:

[0052] 10. First steel structure bridge; 11. First pier crossbeam; 12. First outer longitudinal beam; 13. First inner longitudinal beam;

[0053] 20. Second steel structure bridge; 21. Second pier crossbeam; 22. Second outer longitudinal beam; 23. Second inner longitudinal beam;

[0054] 30. Buildings;

[0055] 40. Square;

[0056] 50. Steel columns;

[0057] 60. Support rail; 61. Sliding rail section; 610. Sliding guide groove; 611. Lower limit groove; 62. Limiting plate; 63. Assembly bolt; 64. Longitudinal baffle; 65. Damping layer; 66. Limiting clamp; 67. Limiting bolt; 68. Translation drive rack;

[0058] 70. Moving plate device; 71. Longitudinal support plate; 711. Vertical support plate; 712. Auxiliary support vertical plate; 713. Auxiliary guide rod; 714. Horizontal support plate; 72. Roller; 73. Transverse support plate; 731. Slide rail; 732. Lower support plate; 7320. Vertical adjustment hole; 7321. Vertical guide hole; 7322. Vertical guide rod; 74. Transverse adjustment bolt; 75. Translation drive motor; 76. Translation drive gear; 77. Auxiliary adjustment bolt; 78. Auxiliary support base; 79. Casters;

[0059] 80. Windproof device; 81. Windproof cloth; 82. Side connecting frame; 821. Side connecting main frame; 822. Side connecting rod; 83. Intermediate connecting frame; 831. Intermediate connecting main frame; 832. Intermediate connecting rod;

[0060] 90. Processing device; 91. Vertical adjustment plate; 910. Insertion connecting groove; 92. Vertical adjustment bolt; 93. Cleaning mechanism; 931. Cleaning support base; 932. Cleaning connecting strip; 933. Brush bristles; 94. Painting mechanism; 941. Painting support base; 942. Painting connecting strip; 943. Painting roller. Detailed Implementation

[0061] The following is in conjunction with the appendix Figure 1-14 The present invention will be described in further detail below.

[0062] refer to Figure 2 The steel structure ring bridge includes a first steel structure bridge 10 and a second steel structure bridge 20; the first steel structure bridge 10 and the second steel structure bridge 20 are arc-shaped and located on the same circumference; the angle of the first steel structure bridge 10 is greater than the angle of the second steel structure bridge 20; one end of the first steel structure bridge 10 and the second steel structure bridge 20 that are close to each other is connected to the building 30, and the other end that are close to each other is connected to the square 40.

[0063] refer to Figure 3 The first steel structure bridge 10 includes six fan-shaped first pier crossbeams 11 evenly distributed at equal angles and five first mid-span beams; the first mid-span beams are located between adjacent pairs of first pier crossbeams 11; the first mid-span beams include a pair of fan-shaped first inner longitudinal beams 13 and a pair of fan-shaped first outer longitudinal beams 12; the pair of first outer longitudinal beams 12 are located outside the pair of first inner longitudinal beams 13.

[0064] refer to Figure 3 The second steel structure bridge 20 includes three fan-shaped second pier crossbeams 21; the angle between the pair of second pier crossbeams 21 closer to the building 30 is greater than the angle between the pair of second pier crossbeams 21 closer to the plaza 40; a fan-shaped second outer longitudinal beam 22 and a fan-shaped second inner longitudinal beam 23 are arranged between the pair of second pier crossbeams 21 closer to the plaza 40, and the second inner longitudinal beam 23 is located inside the second outer longitudinal beam 22; a pair of second outer longitudinal beams 22 and a pair of second inner longitudinal beams 23 are arranged between the pair of second pier crossbeams 21 closer to the building 30, and the pair of second inner longitudinal beams 23 is located inside the pair of second outer longitudinal beams 22.

[0065] The first pier crossbeam 11, the first outer longitudinal beam 12, the first inner longitudinal beam 13, the second pier crossbeam 21, the second outer longitudinal beam 22, and the second inner longitudinal beam 23 are all referred to as segmented beams;

[0066] Several rectangular steel columns 50 are welded to the upper surface of the segmented beam.

[0067] This application discloses a construction process for a long-span steel structure ring bridge, with reference to... Figure 1 Specifically, it includes the following steps:

[0068] Step S001: Segment beams are fabricated in the factory; piers are poured on-site and temporary supports are erected on-site; the temporary supports include a bottom reinforced concrete foundation and an upper steel pipe lattice column; the distance between adjacent piers is greater than 50 meters.

[0069] Step S002: Segment beam transportation; crane in place;

[0070] Step S003, Segment beam hoisting: The segment beams are hoisted onto the piers and temporary supports using a crane;

[0071] Step S004, Welding of the entire steel bridge: Welding the gaps between adjacent segment beams;

[0072] Step S005, painting; the scope of painting includes (1) the outer surface of the steel box girder; (2) the welds welded on site; (3) the damaged parts during transportation and hoisting; the painting is done by manual roller coating;

[0073] Step S006: Remove temporary supports;

[0074] Step S007, create terrain to conceal bridge piers:

[0075] (1) Adjust the garden path. Based on the design location of the bridge span, try to adjust the center line of the garden path to be in the exact center of the bridge span, leaving space for the slope design on both sides.

[0076] (2) Based on the location of the garden path and the bridge pier, as well as the elevation of the bridge deck, optimize the location and elevation design of the slope so that the cone slope can hide the bridge pier within the line of sight to the greatest extent.

[0077] (3) Finally, through the design of green plants, the exposed part of the bridge piers on the slope of the cone is covered, so as to achieve a flexible transition between the cone slope and the bridge surface and completely hide the bridge piers.

[0078] This application discloses a welding auxiliary device for a long-span steel structure ring bridge, which is used to assist welders in completing the gap between adjacent segmental beams of the bridge deck. (Refer to...) Figure 4 and Figure 5 It includes a support rail 60, a movable plate device 70, and a pair of wind deflectors 80; the movable plate device 70 includes a movable plate that is horizontally movable on the support rail 60 and a translation drive mechanism for driving the movable plate; the pair of wind deflectors 80 are respectively disposed at both ends of the movable plate and distributed along the moving direction of the movable plate; the wind deflectors 80 are used to deflect wind.

[0079] refer to Figures 4-6The supporting guide rail 60 includes a pair of parallel rectangular sliding guide rails and a pair of parallel longitudinal baffles 64; the sliding guide rail includes several rectangular sliding guide rail segments 61; damping layers 65 are respectively provided on the lower end surface of the sliding guide rail segment 61 and the lower end surface of the longitudinal baffle 64; a rectangular groove-shaped sliding guide groove 610 is formed on the upper end surface of the sliding guide rail segment 61, and a rectangular groove-shaped lower limiting groove 611 is formed on the lower end surface; the sliding guide groove 610 and the lower limiting groove 611 are opened along their respective length directions; a limiting component is provided in the lower limiting groove 611; the limiting component includes a pair of limiting clamps 66 and a pair of limiting bolts 67; the limiting clamps 66 are rectangular. The limiting plates 66 are located within the lower limiting groove 611; the length direction of the limiting clamps 66 is parallel to the length direction of the lower limiting groove 611; a pair of limiting guide posts are formed on the mutually distant end faces of the pair of limiting clamps 66; the pair of limiting guide posts pass vertically through the corresponding side walls of the lower limiting groove 611; the limiting bolts 67 correspond one-to-one with the limiting clamps 66; the limiting bolts 67 pass vertically through and are screwed onto the corresponding side walls of the lower limiting groove 611; the inner end of the limiting bolts 67 is rotatably connected to the corresponding side limiting clamps 66; during operation, the pair of limiting clamps 66 clamp at least one pair of steel columns 50, and the pair of sliding guide rails are located on adjacent segmented beams and on both sides of the welded seam.

[0080] When installing the sliding guide section 61, at least one pair of steel columns 50 are positioned on the lower limit groove 611. Then, by rotating the limit bolts 67 on both sides, the limit clamps 66 on both sides of the steel column 50 are made to abut against the steel column 50, thus fixing the sliding guide section 61. Multiple sliding guide sections 61 are fixed in sequence in the above manner to form a complete sliding guide.

[0081] refer to Figures 4-6 The supporting guide rail 60 also includes four L-shaped limiting plates 62; assembly bolts 63 are screwed onto the sliding guide rail sections 61 at both ends of the sliding guide rail; the assembly bolts 63 correspond one-to-one with the limiting plates 62; the screws of the assembly bolts 63 pass through the longitudinal portion of the limiting plate 62 on the corresponding side, which is parallel to the length direction of the sliding guide rail; a pair of longitudinal baffles 64 are respectively set at both ends of a pair of sliding guide rails and respectively block the openings at both ends of the gap between the pair of sliding guide rails; the longitudinal baffles 64 are located between the ends of the pair of sliding guide rails on the same side and the pair of limiting plates 62 on the corresponding side; the upper end face of the longitudinal baffles 64 is flush with the upper end face of the sliding guide rail; the longitudinal baffles 64 have various length specifications.

[0082] After a pair of sliding guide rails are installed, four limiting plates 62 are connected by assembly bolts 63, and then longitudinal baffles 64 are vertically inserted between the ends of a pair of sliding guide rails on the same side and the pair of limiting plates 62 on the corresponding side.

[0083] refer to Figure 4 , Figure 5 , Figure 7 and Figure 8 The movable plate includes a pair of cuboid longitudinal support plates 71 and a pair of cuboid transverse support plates 73; the longitudinal support plates 71 correspond one-to-one with the sliding guide rails and the length direction of the longitudinal support plates 71 is parallel to the length direction of the sliding guide rails; the length direction of the pair of transverse support plates 73 is perpendicular to the length direction of the sliding guide rails; a rectangular welding port with openings at the top and bottom is formed between the pair of transverse support plates 73 and the pair of longitudinal support plates 71; a slide rail 731 with a T-shaped cross-section is formed on the upper end surface of the transverse support plate 73; a pair of slide grooves with a T-shaped cross-section for the slide rail 731 to slide on the lower end surface of the longitudinal support plate 71 are formed; the direction of the slide grooves is perpendicular to the length direction of the sliding guide rails; a transverse adjustment component is provided on the longitudinal support plate 71; the transverse adjustment component is used to adjust the position between the longitudinal support plate 71 and the pair of transverse support plates 73 on the corresponding side.

[0084] refer to Figure 4 and Figure 5 The lateral adjustment assembly includes a pair of lateral adjustment bolts 74; a vertical support plate 711 is formed on the lower end face of the longitudinal support plate 71 away from the pair of lateral support plates 73; the vertical support plate 711 is perpendicular to the lateral support plates 73; the pair of lateral adjustment bolts 74 pass through vertically and are screwed onto the vertical support plate 711; the screw axis of the lateral adjustment bolts 74 is perpendicular to the length direction of the sliding guide rail; the lateral adjustment bolts 74 correspond one-to-one with the lateral support plates 73 and the lateral support plates 73 are screwed onto the lateral adjustment bolts 74 on the corresponding side.

[0085] When adjusting the position between the longitudinal support plate 71 and the pair of transverse support plates 73 on the corresponding side, simultaneously rotate the pair of transverse adjusting bolts 74 on the same side. With the cooperation of the slide rail 731 and the slide groove, the pair of transverse support plates 73 move synchronously relative to the longitudinal support plate 71, thereby completing the adjustment. In this way, the width of the moving plate and the width of the welding port can be adjusted, making it more adaptable.

[0086] refer to Figure 4 and Figure 5 A pair of rollers 72 are installed on the lower end face of the longitudinal support plate 71; the pair of rollers 72 are distributed along the length direction of the longitudinal support plate 71; the rollers 72 are located in the sliding guide groove 610 on the corresponding side.

[0087] refer to Figure 4 and Figure 5A pair of auxiliary support vertical plates 712 are formed on the lower end face of the longitudinal support plate 71; the pair of auxiliary support vertical plates 712 are distributed along the length direction of the longitudinal support plate 71; an auxiliary guide rod 713 is formed vertically on the end face of the auxiliary support vertical plate 712 near the welding port; an auxiliary adjusting bolt 77 is rotatably connected to the end face of the auxiliary support vertical plate 712 near the welding port; the auxiliary adjusting bolt 77 is perpendicular to the end face of the auxiliary support vertical plate 712 near the welding port; an auxiliary support seat 78 is vertically sleeved on the auxiliary guide rod 713; the auxiliary support seat 78 is sleeved and screwed onto the auxiliary adjusting bolt 77; a caster wheel 79 is installed on the bottom surface of the auxiliary support seat 78; the caster wheel 79 is in contact with the upper surface of the segment beam.

[0088] The presence of four auxiliary support seats 78 and four casters 79 can be used to strengthen the support of the moving plate, making the moving plate more stable and able to withstand greater weight. At the same time, since the position of the auxiliary support seats 78 can be adjusted by rotating the auxiliary adjusting bolts 77, it can avoid the steel columns 50 on the upper surface of the segment beam.

[0089] refer to Figure 4 and Figure 5 A horizontal support plate 714 is vertically formed on the end face of the vertical support plate 711 away from the pair of horizontal support plates 73; the translation drive mechanism includes a pair of translation drive motors 75 and a pair of translation drive gears 76; the translation drive gears 76 correspond one-to-one with the translation drive motors 75 and are fixed on the output shaft of the translation drive motors 75 on the corresponding side; a horizontally arranged translation drive rack 68 is formed on the outer end face of the sliding guide section 61; when several sliding guide sections 61 form a sliding guide, all translation drive racks 68 on the same side form a total translation drive rack; the translation drive gears 76 mesh with the total translation drive rack on the corresponding side.

[0090] During welding, a pair of translation drive motors 75 drive a pair of translation drive gears 76 to rotate synchronously. Through the meshing of the translation drive gears 76 with the translation drive rack, the moving plate is moved.

[0091] refer to Figure 4 , Figures 11-14The welding auxiliary equipment also includes a processing device 90; a lower support plate 732 is formed on the lower end surface of the transverse support plate 73; the lower support plate 732 is perpendicular to the moving direction of the moving plate; the processing device 90 includes a pair of vertical adjustment plates 91, a pair of vertical adjustment bolts 92, a cleaning mechanism 93, and a coating mechanism 94; a rectangular vertical adjustment hole 7320 and a pair of rectangular vertical guide holes 7321 are formed on the lower support plate 732; the vertical guide holes 7321 and the vertical adjustment holes 7320 are parallel to the moving direction of the moving plate and are vertically arranged; the pair of vertical guide holes 7321 are located on both sides of the vertical adjustment hole 7320; between the upper and lower sidewalls of the vertical guide holes 7321 The vertical guide rod 7322 is formed; the vertical adjustment plate 91 is T-shaped; a pair of vertical guide blocks that mate with the vertical guide holes 7321 are formed on the end face of the vertical adjustment plate 91 near the lower support plate 732; the vertical guide blocks are vertically movably disposed in the vertical guide holes 7321 on the corresponding side and vertically sleeved on the vertical guide rod 7322; the screw of the vertical adjustment bolt 92 passes horizontally through the vertical adjustment hole 7320 and is screwed onto the vertical adjustment plate 91, with its head abutting against the end face of the lower support plate 732 away from the vertical adjustment plate 91; a T-shaped insertion connecting groove 910 is formed on the lower end face of the vertical adjustment plate 91; the insertion connecting groove 910 is set with openings at both ends perpendicular to the moving direction of the moving plate.

[0092] By loosening the vertical adjusting bolt 92, the vertical adjusting plate 91 can be moved along a pair of vertical guide rods 7322, thereby controlling the vertical height of the cleaning mechanism 93 and the painting mechanism 94, and controlling the participation or withdrawal of the cleaning mechanism 93 and the painting mechanism 94 in the work.

[0093] refer to Figures 11-12 The cleaning mechanism 93 includes a cleaning support base 931; the upper end surface of the cleaning support base 931 is formed with a T-shaped cleaning connecting strip 932 that mates with the insertion connecting groove 910, and the lower end surface is provided with a number of evenly distributed bristles 933; in order to accommodate arc-shaped welding gaps and welds, the cleaning support base 931 has a variety of different lengths.

[0094] refer to Figure 13 The coating mechanism 94 includes a coating support base 941; a T-shaped coating connecting strip 942 that mates with the insertion connecting groove 910 is formed on the upper end surface of the coating support base 941, and a horizontally arranged coating roller 943 is rotatably connected to the lower end surface; the axial direction of the coating roller 943 is perpendicular to the moving direction of the moving plate.

[0095] refer to Figure 14 The cleaning mechanism 93 is located at the front end of the moving plate in the direction of movement; the painting mechanism 94 is located at the rear end of the moving plate in the direction of movement.

[0096] During the movement of the moving plate, if the cleaning mechanism 93 is in the working position, its brush bristles 933 can clean the weld seams, which is beneficial for subsequent welding. When painting is required, the painting roller 943 of the painting mechanism 94 can be dipped in paint. During the movement of the moving plate, the brush bristles 933 clean the weld seams from the front, while the painting mechanism 94 paints the weld seams from the rear. When the weld seams and gaps are arc-shaped, and the cleaning mechanism 93 and painting mechanism 94 cannot fully cover them, the cleaning mechanism 93 can be replaced with a cleaning support 931 of appropriate length. The painting mechanism 94 can be manually held. Thus, as the moving plate moves, the cleaning mechanism 93 cleans the weld seams from the front, while the painting mechanism 94 is manually held and painted.

[0097] refer to Figure 4 , Figures 7-10 The windproof device 80 includes a connecting frame and a windproof cloth 81; the connecting frame includes a pair of side connecting frames 82 and a middle connecting frame 83; the side connecting frames 82 correspond one-to-one with the longitudinal support plates 71 and are detachably fixed on the longitudinal support plates 71 on the corresponding side; the middle connecting frame 83 is detachably fixed on the transverse support plate 73; the spacing between the pair of side connecting frames 82 is adjustable.

[0098] refer to Figures 8-10 The side connecting frame 82 includes an inverted L-shaped side connecting main frame 821 and a cylindrical side connecting rod 822 fixed to the lower end face of the horizontal part of the side connecting main frame 821; the end face of the longitudinal support plate 71 on the corresponding side is formed with two rows of threaded holes distributed vertically, and the upper and lower threaded holes correspond one to one; a pair of vertically opposite threaded holes at the corresponding positions are respectively screwed with longitudinal bolts; the screw of the longitudinal bolt passes through the vertical part of the side connecting main frame 821; the intermediate connecting frame 83 includes an inverted L-shaped intermediate connecting main frame 831 and a cylindrical intermediate connecting rod 832 fixed to the lower end face of the horizontal part of the intermediate connecting main frame 831; the vertical part of the intermediate connecting main frame 831 is fixed to the end face of the corresponding side of the transverse support plate 73 by a pair of vertically distributed bolts; the distance between the intermediate connecting rod 832 and the moving plate is greater than the distance between the side connecting rod 822 and the moving plate.

[0099] After the spacing between a pair of longitudinal support plates 71 is adjusted, the spacing between a pair of side connecting frames 82 also needs to be adjusted to prevent the subsequent windbreak cloth 81 from being unable to be fitted.

[0100] refer to Figure 7 and Figure 8 The windproof cloth 81 is connected end to end and is fitted from bottom to top onto a pair of side connecting rods 822 and a middle connecting rod 832; the lower end face of the windproof cloth 81 is flush with the upper end face of the longitudinal baffle 64, and the upper end face is higher than the upper end face of the movable plate.

[0101] The working principle of a welding auxiliary equipment for a large-span steel structure ring bridge is as follows:

[0102] During welding, the welder squats on the moving plate, and then the translation drive mechanism moves the moving plate horizontally. During this process, the welder welds the weld seam between the upper surfaces of the segmented beams through the welding port. This way, the welder only needs to focus on welding, which improves concentration and helps to improve welding quality and efficiency. At the same time, since the weld seam is located between a pair of longitudinal baffles 64 and a pair of sliding guide rails, the impact of wind on welding can be reduced, which helps to improve welding quality. Furthermore, wind deflectors 80 are installed at both ends of the moving plate in the direction of movement, which further reduces the impact of wind on welding.

[0103] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A welding auxiliary device for a large-span steel structure ring bridge, characterized in that: The system includes a support guide rail (60) and a moving plate device (70); the support guide rail (60) includes a pair of parallel rectangular sliding guide rails; the sliding guide rails are detachably fixed to the bridge deck and the pair of sliding guide rails are respectively located on adjacent segment beams; the moving plate device (70) includes a moving plate that moves horizontally along the length direction of the pair of sliding guide rails and a translation drive mechanism for driving the moving plate; the moving plate has a rectangular welding port with openings at the top and bottom in the middle; the welding port is located directly above the welding seam of the adjacent segment beam; The spacing between the pair of sliding guide rails is adjustable; the width of the welding port perpendicular to the moving direction of the moving plate is adjustable. The movable plate includes a pair of longitudinal support plates (71) and a pair of transverse support plates (73); the longitudinal support plates (71) correspond one-to-one with the sliding guide rail and are parallel to the length direction of the sliding guide rail; the pair of transverse support plates (73) are perpendicular to the length direction of the sliding guide rail; the welding port is the gap between the pair of longitudinal support plates (71) and the pair of transverse support plates (73); the pair of transverse support plates (73) are slidably disposed on the lower end surface of the pair of longitudinal support plates (71) and the sliding direction is perpendicular to the length direction of the sliding guide rail; a transverse adjustment component is provided on the longitudinal support plate (71); the transverse adjustment component is used to adjust the position between the longitudinal support plate (71) on the corresponding side and the pair of transverse support plates (73); An auxiliary support vertical plate (712) is formed on the lower end face of the longitudinal support plate (71), and a pair of auxiliary support vertical plates (712) are distributed along the length direction of the longitudinal support plate (71). An auxiliary guide rod (713) is formed vertically on the end face of the auxiliary support vertical plate (712) near the welding port. An auxiliary adjusting bolt (77) is rotatably connected to the end face of the auxiliary support vertical plate (712) near the welding port. The auxiliary adjusting bolt (77) is perpendicular to the end face of the auxiliary support vertical plate (712) near the welding port. An auxiliary support seat (78) is vertically sleeved on the auxiliary guide rod (713). The auxiliary support seat (78) is sleeved and screwed onto the auxiliary adjusting bolt (77). A universal wheel (79) is installed on the bottom surface of the auxiliary support seat (78). The universal wheel (79) is in contact with the upper surface of the segment beam.

2. The auxiliary equipment for welding large-span steel structure ring bridges according to claim 1, characterized in that: The length of the sliding guide rail is adjustable.

3. The auxiliary equipment for welding large-span steel structure ring bridges according to claim 2, characterized in that: The sliding guide rail includes several sliding guide rail segments (61) distributed along its length; a limiting component is provided at the bottom of the sliding guide rail segment (61); the limiting component is used to connect to the bridge deck.

4. The auxiliary equipment for welding large-span steel structure ring bridges according to claim 1, characterized in that: The support rail (60) further includes a pair of longitudinal baffles (64); the pair of longitudinal baffles (64) are respectively disposed at both ends of the pair of sliding rails and respectively block the openings at both ends of the gap between the pair of sliding rails; the upper end face of the longitudinal baffle (64) is flush with the upper end face of the sliding rail; the longitudinal baffle (64) has various lengths.

5. The auxiliary equipment for welding large-span steel structure ring bridges according to claim 4, characterized in that: The movable plate is provided with windproof devices on both sides of its translational direction; the windproof device includes a connecting frame that is detachably fixed on the movable plate and a windproof cloth (81) that is detachably installed on the connecting frame; the lower end face of the windproof cloth (81) is flush with the upper end face of the longitudinal baffle (64) and the upper end face is higher than the upper end face of the movable plate; the distance between the middle part of the end of the windproof cloth (81) away from the movable plate and the movable plate is greater than the distance between the two ends of the windproof cloth (81) and the movable plate.

6. The auxiliary equipment for welding large-span steel structure ring bridges according to claim 5, characterized in that: The connecting frame includes a pair of side connecting frames (82) and a middle connecting frame (83); the middle connecting frame (83) is located between the pair of side connecting frames (82); the spacing between the pair of side connecting frames (82) is adjustable; the side connecting frame (82) includes a detachably fixed inverted L-shaped side connecting main frame (821) on the movable plate and a cylindrical side connecting rod (822) fixed on the lower end face of the horizontal part of the side connecting main frame (821); the middle connecting frame (83) includes a detachably fixed inverted L-shaped middle connecting main frame (831) on the movable plate and a cylindrical middle connecting rod (832) fixed on the lower end face of the horizontal part of the middle connecting main frame (831); the windproof cloth (81) is connected end to end and sleeved on the pair of side connecting rods (822) and the middle connecting rod (832) from bottom to top.

7. The auxiliary equipment for welding large-span steel structure ring bridges according to claim 1, characterized in that: It also includes a processing device (90); a pair of lower support plates (732) are provided on the bottom surface of the movable plate; the pair of lower support plates (732) are distributed along the length direction of the sliding guide rail and located on both sides of the welding port; the processing device (90) includes a pair of vertical adjustment plates (91), a cleaning mechanism (93), and a coating mechanism (94); the vertical adjustment plates (91) correspond one-to-one with the lower support plates (732); the pair of lower support plates (732) are located on the pair of vertical adjustment plates (91). Between; the vertical adjustment plate (91) is vertically slidably disposed on the lower support plate (732) on the corresponding side and the vertical adjustment plate (91) is adjustable in height; the cleaning mechanism (93) is detachably connected to the bottom of the vertical adjustment plate (91) at the front end of the moving direction of the moving plate; the cleaning mechanism (93) has various length specifications; the coating mechanism (94) is detachably connected to the bottom of the vertical adjustment plate (91) at the rear end of the moving direction of the moving plate.

8. The auxiliary equipment for welding large-span steel structure ring bridges according to claim 1, characterized in that: The bottom of the movable plate is provided with two sets of auxiliary support components; the two sets of auxiliary support components are located on both sides of the welding working port perpendicular to the moving direction of the movable plate; the auxiliary support components include a pair of auxiliary support members; the pair of auxiliary support members are distributed along the moving direction of the movable plate; the auxiliary support members include the auxiliary support base (78) and the universal wheel (79) installed on the lower end surface of the auxiliary support base (78); the position of the auxiliary support base (78) in the moving direction perpendicular to the movable plate is adjustable.

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